source: trunk/kernel/syscalls/sys_utls.c @ 1

Last change on this file since 1 was 1, checked in by alain, 5 years ago

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1/*
2 * kern/sys_utls.c - User Thread Local Storage
3 *
4 * Copyright (c) 2008,2009,2010,2011,2012 Ghassan Almaless
5 * Copyright (c) 2011,2012 UPMC Sorbonne Universites
6 *
7 * This file is part of ALMOS-kernel.
8 *
9 * ALMOS-kernel is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; version 2.0 of the License.
12 *
13 * ALMOS-kernel is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16 * General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with ALMOS-kernel; if not, write to the Free Software Foundation,
20 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23#include <types.h>
24#include <errno.h>
25#include <thread.h>
26#include <kmem.h>
27#include <kmagics.h>
28#include <semaphore.h>
29
30#define UTLS_SET       1
31#define UTLS_GET       2
32#define UTLS_GET_ERRNO 3
33
34int sys_utls(uint_t operation, uint_t value)
35{
36        struct thread_s *this = current_thread;
37 
38        switch(operation)
39        {
40        case UTLS_SET:
41                this->info.usr_tls = value;
42                return 0;
43
44        case UTLS_GET:
45                return this->info.usr_tls;
46
47        case UTLS_GET_ERRNO:
48                return this->info.errno;
49
50        default:
51                this->info.errno = EINVAL;
52                return -1;
53        }
54}
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